Lock



Feb. 28, 1928.

1,661,101 P. R. WALLS LOCK Filed Nov. 5, 1926 Patented Feb. 28, 1928.

UNITED STATES rn'rnanonnn'r WALLS, or osimwn, ONTARIO, CANADA.

LOCK.

Application filed November 3, 1926. Serial No. 145,996.

face plate removed and showing the parts in the unlocked position.

Fig. 3 is a. similar view to Figure 1 showing the parts in the lockedposition.

Fig. 4 is a similar View to Figures 2 and 3 showing the parts in thedouble locked position. I

Fig. is a plan sectional view on line 5-5 Fig. 2.

Fig. 6 is a vertical sectional view on line 6-6 Fig. 3.

In the drawings like characters of reference indicate correspondingparts in each figure. I

1 indicates the main casing body of my lock provided with a rectangularinterior 2 having an extension 3 forming with the face plate 4 a boltorifice, such orifice being located interinediately of the height of theinterior 2 so as to form above the orifice a shoulder 5 and a recess 6below the orifice for a purpose which will hereinafter appear. 7 is abolt provided with an inward extension 7* offset upwardly from the bodyof the bolt 7 so as to form a shoulder 7 opposing the shoulder 5, and ashoulder 7 for a purpose which will hereinafter appear.

2* is a groove formed in the face of the interior of the lock case andextending 1ongitudinally thereof. 9, and 11 are a series of cylindricaltumbler members, the lower peripheral portion thereof fitting within thegroove 2 and the upper peripheral portion against the lower edge of theextension 7 of the bolt 7 The upper portion of each tumbler member 9, 10and 11 is increased in width as in dicated at 9*, 10 and 11 so as tobear respec tively against the base of the casing interior 2 and theinner face of the face plate 4. Each tumbler member is provided with akey receiving orifice designated respectively 9, 10 and 11, the inner orcylindrical portion of which is in central alignment with thecorresponding portion of the key openings 4*, and 4 of the face plate 4.

12 is a p n extending radially from the tumbler 11 and adapted to beswung into engagement with the inner end of the bolt extension 7*. Thetumbler 10 is provided with. a radial pin 13 extending into the-recess 11 of the bolt extension 7*, and 15 is a pin extending radially from thetumbler 9 and normally in a horizontal direction into the recess 6beneath the bolt 7.

Having described theprincipal parts involved in my invention I willbriefly describe the operation of the same.

When it is desired to lock the door the key is inserted in the keyorifice t and into the orifice 1.1 of the tumbler 11. The keyis thenturned to swing the pin 12 into engagement with the rear end of the boltextension 7 so as to force the bolt forward, the slot 14 permitting thismovement without affecting the pin 13.

\Vhen it is desired to unlock the door the key is inserted into theorifice 1" so as to pass into the orifice 10 of the tumbler 10 which isthen swung in a rearward direction so that the pin 13 engages the innerend of the slot 14 thereby forcing the bolt in an inward di rectioncarrying the pin 12 back to normal.

After the bolt has been shot as above described by means of the pin 12coaoting with the bolt extension 7* the bolt may be double locked byinserting the key in the orifice 1" so as to swing the pin 15 intoengagement with the shoulder 7. i

From this description it willbe seen that I have devised a very simpleconstruction of lock which any unauthorized person would find difficultto operate as he would be uncertain into which key orifice the keyshould be inserted in order to operate the lock to unlock the door, andat the same time I provide a lock in which there are no parts liable toget out of order or break.

What I claim as my invention is:

1. A lock comprising a main casing, a face plate therefor having aplurality of key orifices formed therein, a bolt slidably mounted withinthe casing and a plurality of tumbler members having key orificestherein corresponding to the orifices of the face plate, and a pinextending radially from each tumbler member, one of said pins beingadapted to engage the inner end of the bolt to move it in the lockingposition and another of said pins ill) flees formed therein, a boltslidably mounted within the casing and having a shoulder formed thereina tumbler member mounted in the casing provided with a pm adapted to becarried into and out of engagement With the aforesaid shoulder when thetumbler 1 member is swung by the, inserted key, and separate tumblermembers also operated by the inserted key for carrying the bolt lnto andout-oi the locking position respectively.

PETER ROBERT WVALLS.

